<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link rel="stylesheet" type="text/css" href="test.css" title="test">
  <link rel="stylesheet" type="text/css" href="main.css" title="main">
  <link rel="stylesheet" type="text/css" href="index.css" title="index">
</head>
<body>
  <h1>test</h1>
  <p>this is a test page</p>
  <span>hello css</span>
</body>
</html>